Malicious PDF — malware analysis report

Static analysis result for SHA-256 39de50370eb43fe5…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 22:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 98d0de8e77510afa82a34ba46d928058 SHA-1: c10d03405dcbb44231513a6d4648e4379924d455 SHA-256: 39de50370eb43fe50d67031751606e0b22911d666455b6086ec48e3e0f1a012a
234 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body text and heuristic firings indicate a social engineering lure, instructing the user to install a browser extension or update to view content. This is a common tactic for credential harvesting or malware delivery. No scripts were extracted, limiting further analysis of specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=twitter+video+er+firefox In PDF document text
    • http://sekodaju.peirsoncenter.com/uploads/1/3/0/7/130775075/botadetowejenaj.pdfIn PDF document text
    • http://junolikew.jmccormickbennett.com/uploads/1/3/1/1/131164312/lumiludubal.pdfIn PDF document text
    • http://files.matthiasnolte.com/uploads/1/3/1/4/131408100/4131136.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5522/5763/files/cuento_bestiario_de_seres_fantsticos_mexicanos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/werevitowoxaniwavikafux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/gaburit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8940/2783/files/albertine_sarrazin_l_astragale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7674/7413/files/english_baroque_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/tamaganatafedojej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0894/8386/files/cfm56_5b_component_identification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/56901454369.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C59 3016 bytes
SHA-256: cbb52481ce94e16f1aa7c1e5556943e0858c32639ae52c58d7d3596933ba349e
font_01_sfnt_off00006715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6715 4652 bytes
SHA-256: 0511a16e14e6a67aa94b16040c451402f3aae66164bb2ba3df3becc8ec73728b
font_02_sfnt_off0000770e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770E 10320 bytes
SHA-256: 12423f8c629e41f849ac97a252cc980f7704d54a404bb1ac4e2e324d9585d6d7

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